Officials say a Washington Metro subway train crashed into the back of another at a rail yard, injuring three workers.
The Metro transit agency says injuries were minor and not life-threatening. No passengers were on board when the crash occurred at about 4:30 a.m. Sunday.
Metro says a six-car train was returning to the West Falls Church Rail Yard in northern Virginia when it rear-ended a parked six-car train. Two workers were cleaning the parked train to get it ready for service.
Metro officials are investigating.
The crash was the latest accident involving Washington's rail system. A June crash killed eight passengers and the train operator. A track repairman was killed in August when he was hit by a gravel spreader. Another worker was killed when he was hit by a train in September.